Mammoths will not harm the Dragonborn unless they stray too close or attack the Mammoth first. Mammoths almost always travel in packs of two or three and stay with Giants, their herders so to speak. Any harm done to one of these creatures will signal the others in the nearby area, attracting multiple large, powerful enemies.
Mammoths are moderately fast creatures with a high amount of health and power. One or two stomps from a Mammoth will kill the Dragonborn, depending on his or her defensive skill.
Mammoths drop: Mammoth Tusk, Mammoth Meat and a low amount of Treasure.
Mammoths have a Resistance to Frost.